...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ultrasound in Medicine and Biology >Ultrasonic tissue characterization with integrated backscatter during inotropic stimulation.
【24h】

Ultrasonic tissue characterization with integrated backscatter during inotropic stimulation.

机译：在正性肌力刺激过程中集成背向散射的超声组织表征。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Ultrasonic tissue characterization with integrated backscatter is an objective method to quantitatively define the physical state of the myocardium. To determine if backscatter imaging during inotropic stimulation could be used objectively to determine the myocardial viability and ischemia in patients with ischemic heart disease, the backscatter changes were examined in 23 patients with myocardial infarction during dobutamine stress two-dimensional (2-D) echocardiography. Coronary angiography was performed within 1 to 2 days after the stress test. The results of this study demonstrated that changes in backscatter variability correlated significantly with the wall motion changes in stress echocardiography during dobutamine infusion (p < 0.0001). In addition, it was shown that the backscatter changes were significantly different in various types of myocardial tissue. In 23 healthy control segments, the ultrasonic backscatter variability was preserved and unchanged during inotropic stimulation (p = NS). In 15 viable infarct zones, restoration or an increase in backscatter variability during low-dose dobutamine infusion was noted, this being lost when ischemia developing during high-dose dobutamine infusion (p < 0.01). In 9 nonviable infarct zones, the phase-weighted variation was usually < or = 0 and did not change significantly during inotropic stimulation, regardless of the patency of the infarct-related arteries. In 15 remote ischemic myocardial zones, the backscatter variability was preserved at the baseline level, did not change during low-dose dobutamine infusion, but decreased significantly during high-dose dobutamine stress (p < 0.01). In conclusion, dobutamine stress tissue characterization could offer an objective approach for the detection of myocardial viability and ischemia, and might be a useful adjunct to the conventional stress echocardiography.
机译：具有集成背向散射的超声组织表征是定量定义心肌物理状态的客观方法。为了确定在正性肌力刺激过程中的反向散射成像是否可以客观地用于确定缺血性心脏病患者的心肌活力和局部缺血，在多巴酚丁胺应力二维（2-D）超声心动图检查中检查了23例心肌梗死患者的反向散射变化。压力测试后1至2天内进行冠状动脉造影。这项研究的结果表明，在多巴酚丁胺输注期间，背向散射变异性的变化与应力超声心动图的壁运动变化显着相关（p <0.0001）。另外，已经表明在各种类型的心肌组织中后向散射变化显着不同。在23个健康对照组中，在正性肌力刺激过程中，超声反向散射变异性得以保留并保持不变（p = NS）。在15个可行的梗塞区中，发现在小剂量多巴酚丁胺输注期间恢复或背散射变异性增加，当在大剂量多巴酚丁胺输注期间缺血发展时，这种损失消失了（p <0.01）。在9个不可行的梗塞区域中，相变加权通常小于或等于0，并且在正性肌力刺激期间无明显变化，无论梗塞相关动脉是否通畅。在15个远端缺血性心肌区，反向散射变异性保持在基线水平，在低剂量多巴酚丁胺输注期间未发生变化，但在高剂量多巴酚丁胺应激期间显着降低（p <0.01）。总之，多巴酚丁胺应激组织的表征可以为检测心肌活力和局部缺血提供一种客观的方法，并且可能是常规应激超声心动图的有用辅助手段。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号